What are the contents of acrobatic calligraphy?

Writing calligraphy blindly, upside down, etc.

Acrobatic calligraphy is a combination of acrobatic art and calligraphy creation, and calligraphy characters are written while performing acrobatics. There are many forms, such as blind handwriting, which means writing blindfolded, and inverted calligraphy, which means one hand stands upside down and the other hand writes.